HVAC Electrical Buzzing

1 Reply

Hi fellow BPers, I'm having issues with my outside HVAC unit - it's making electrical buzzing noise that's too loud and makes it uncomfortable to be in some of the bedrooms in my house when AC is running.

The noise it's making is this https://1drv.ms/v/s!AneU_VTSiG...  https://1drv.ms/v/s!AneU_VTSiG...

I already had two AC people come in to inspect it and one couldn't even diagnose what was happening (he said "it's just old") and the other one suspects it's a condenser but wasn't sure and thinks it's better to replace the whole unit.

The previous owner of the house says it's only 4 years old and should be fine. 

Did anyone experience something like this? What would you recommend me do, replace the whole unit or keep looking for AC repair people who can finally tell me what's wrong?


Thank you in advance!



This is a common issue; so much so that you can google the issue and get an answer quickly:

"A buzzing noise is usually a sign that there's an electrical issue with the AC. It's just a result of your AC wearing down over time. The noise you're hearing is usually a sign of “ electrical arcing”, an electrical discharge you see when electricity is jumping between circuitry." End.

Take a look at this post for recommendations:  https://www.cooltoday.com/blog....

The age of the AC isn't rocket science either. Here's how:

"Check the upper-right hand corner of the nameplate for the unit's manufacture date. If the manufacture date is not visible on the condenser, you can always locate the brand, model and serial number on the plate, which will help to determine the age of the unit."  End.

And, not all AC trades are highly skilled.  Find yourself a local owner-operator and/or check with other investors in your area to get a great resource. It will save you a lot of money and time.

Hope this helps.